Fair Value of Stock Option and SAR Award Weighted-Average Assumptions (Detail) (USD $)	12 Months Ended
Jun. 30, 2011 Year	Jun. 30, 2010 Year	Jun. 30, 2009 Year
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Risk-free interest rate	1.50%	2.90%	3.20%
Expected life of award	5.2	5.3	4.9
Expected dividend yield of stock	1.50%	1.40%	1.30%
Expected volatility of stock	35.90%	34.50%	26.60%
Weighted-average fair value	$ 18.70	$ 15.77	$ 16.56

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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